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Meaning of microburst

mi•cro•burst

Pronunciation: (mī'kru-bûrst"), [key]
— n. Meteorol.
  1. an intense, localized downdraft of air that spreads on the ground, causing rapid changes in wind direction and speed; a localized downburst.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.